Rude Britannia: British Comic Art at Tate Britain in London

Harry Hill's room contains door fixed to the wall, with a picture of bricks behind it. Words are written by the door which read: "Behind the door is a fake wall. Behind the fake wall is a real wall. We took a photo of the real wall and reproduced it exactly to show you what the walls of the Tate Gallery look like. They are beautiful. Harry."